Pavement and paving unit



July 4, 1933. w JOHNS-ON 1,916,620

PAVEMENT AND PAVING UNIT- Filed June 19, 1931 mws.

N 4A gi m ,5 INVENTOR WITNESS I o- 7 Wrren Jbhnaarg 0 ATTOR N EY Fig. 3is an enlarged detail sectional view After the slabs are laid, tarred orfelt paper Patented July 4 1933 v I i it i STATES PATEN'T OFFICE 1 memeJohnson, at NEW-0339mm, wn- Y r PAVEMENT Annrnvrne Um. Application filedJune is, war Serial n ls s seoi My invention relates to pavements forsideaudrecesses 10 between the tongues 7. The walks, streets" orhighways and to paving recesses 9 and 10 in theedges' of the slabs areunits for use in constructing the same. approximately equal in depth'tothe thick;

It is an object of the present invention to ness of the tongues thedifference being only 5 provide pavement composed of a plurality or soin favor of the recesses. Each of of preformed slabs so interconnectedas to the tongues 6 is provided, with one or more eliminate unevensagging of individual units. holes or openings 11 which extendvertically A further object of the invention is to therethroughforapurpose to be later deprovide an improved"interlocking joint forscribed. o g j 10 the slabs used in constructing my improved 7 The slabs'5 are reinforced by means of suitpavement. 7 v able steel reinforcingwires or rods 12 which A furtherobjectof the invention is to extendsubstantially throughout the length arovide a novel reinforced preformed0011- of the slabs approximately midway between crete slab havingalternate depressions and the upper and lower faces thereof. The ends 5projections in the edges thereof for interof the reinforcing rods arebent either up or locking engagement with projections and dedown so asto extend into and reinforce the pressions in adjacent edges of adjacentslabs respective tongue portions 6 and 7 as clearly when laid inapavement. V shown inFigs. 2 and 3;

Other objects and advantages of the inven- WVhen the slabs or blocks 5are laid to- 20 tion will become apparent during the course gether toform my improved pavement, the of the following detailed descriptionwhich tongues or projections 6 ofone slab'fit withshould be read inconjunction with the accomin the recesses 9 in the edges of an adjacentpanying drawing, which forms a part of this slab and the projections 7fit within the respecification and in which: cesses or depressions 10thereof whereby the Figure 1 is a top plan view of a section adjoiningslabs 'will be so interlocked that of pavement constructed according-tothe in each depends upon the other, thereby prevention; 7 venting any ofthe individual slabs from Fig. 2 is a sectional view taken on the linemoving up down or side-ways with'respect 2-2 of Fig. 1; to any otherslab;

of one of the oints between adjacent slabs, strips 13 are insertedbetween the projections and V 6 and the rear walls'of the depressions 9to'al- Fig. 4 is a perspective view of one of the low for expansionofthe slabs. Cement grout slabs embodying the invention. or other plasticbinderl is then forced into Referring now more specifically to the theholes 11 in the tongues 6, the grout filling drawing, whereinlikenumerals refer to like thespace between the bottom face of the partsthroughout the same, my improved projections 6 and the upper face of thepropavement is composed of preformed slabs 5 jections 7 so as to bindthe slabs firmly t0- formed of concrete or other suitable plasticIgether and to maintain them in proper rela- 0 material laid on top ofasuitable bed (not 'tive positions so that their. upper faces willshown). remain flush at all times. The grouting Each of the concreteslabs is formed with material adheres to the surfacesof the variousspaced tongues or projecting portions 6 and projections and so binds theprojections to- 7 flush with theupper and lower faces re gether as tomake an absolutely solid oint'. spectively of theslab and projectinglaterally A pavement constructed according to my thereof. The tongues 6and 7 are arranged invention will be easy to construct with relinstaggered relation and are formed of a atively unskilled labor since theslabs 5 will thickness a littleless than half the thickness be preformedof the correct proportions durof the slab proper so as to produceslightly ing manufacture and will merely have to be oversized recesses 9between the tongues 6 assembled on a proper bed or sub-surface in 1Wpolygonal slabs, upper and lower tongue members formed with the sides ofsaid slabs and disposed in staggered relationship, said tongue membersbeing slightly less than half the thickness of the slab, the uppertongue members being formed with the upper portion of the slab and thelower tongue members being formed with the'lower portion thereof wherebyto form recesses with which interlocking engagement is made by alternatetongues, the upper tongues of one slab being slightly spaced from thelower tongues of the next adjacent slab and being formed with openingsextending Vertically there through, and a plastic binder forced intosaid openings and in the spaces between said tongue portions to producea solid joint.

2. A pavement comprising a plurality of interfitting slabs,geach of saidslabs having upper and lower tongue portions along the meeting edgesthereof, the uppertongue portions of one slab opposing the lower tongueportion of the next adjacent slab in spaced relationship, said uppertongue portions having vertical openings extending therethrough, and aplastic binder in said openings and in the space betweensaid tongues.

3. A pavement comprising a plurality of slabs, upper and lower tongueportions along the meeting ends of the slabs, the arrangement of thetongue portions providing recesses for the mutual interfitting of thetongue portions, said tongue portions being of less thickness than thedepth of the recesses, the upper tongue portions having openingsextending therethrough, a binder between the horizontal adjoiningsurfaces of said tongue portions holding the top surfaces of the uppertongue portions and slabs on a level, said binder also filling the owings, and a compressible expansion strip etween the upright ends of theupper tongues and adjacent walls of the respective recesses.

WARREN JOHNSON...

